GB2079530B - Magnetic focussing arrangement in a cathode ray tube - Google Patents

Magnetic focussing arrangement in a cathode ray tube

Info

Publication number
GB2079530B
GB2079530B GB8119398A GB8119398A GB2079530B GB 2079530 B GB2079530 B GB 2079530B GB 8119398 A GB8119398 A GB 8119398A GB 8119398 A GB8119398 A GB 8119398A GB 2079530 B GB2079530 B GB 2079530B
Authority
GB
United Kingdom
Prior art keywords
ray tube
cathode ray
magnetic focussing
focussing arrangement
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8119398A
Other languages
English (en)
Other versions
GB2079530A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP8921680A external-priority patent/JPS5715348A/ja
Priority claimed from JP8921580A external-priority patent/JPS5715347A/ja
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB2079530A publication Critical patent/GB2079530A/en
Application granted granted Critical
Publication of GB2079530B publication Critical patent/GB2079530B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only
GB8119398A 1980-07-02 1981-06-24 Magnetic focussing arrangement in a cathode ray tube Expired GB2079530B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8921680A JPS5715348A (en) 1980-07-02 1980-07-02 Electromagnetic focusing cathode ray tube
JP8921580A JPS5715347A (en) 1980-07-02 1980-07-02 Electromagnetic focusing cathode ray tube

Publications (2)

Publication Number Publication Date
GB2079530A GB2079530A (en) 1982-01-20
GB2079530B true GB2079530B (en) 1985-04-11

Family

ID=26430642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8119398A Expired GB2079530B (en) 1980-07-02 1981-06-24 Magnetic focussing arrangement in a cathode ray tube

Country Status (3)

Country Link
US (1) US4439710A (enrdf_load_stackoverflow)
DE (1) DE3125977A1 (enrdf_load_stackoverflow)
GB (1) GB2079530B (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460844A (en) * 1980-12-15 1984-07-17 Hitachi, Ltd. Magnetic focusing, three in-line gun type color picture tube
DE3219954A1 (de) * 1982-05-27 1983-12-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart Farbbildroehre mit twistkorrektur
JPS5840749A (ja) * 1981-09-02 1983-03-09 Toshiba Corp 磁気集束型陰極線管
JPS58145045A (ja) * 1982-02-24 1983-08-29 Hitachi Ltd 陰極線管
US4546287A (en) * 1982-09-27 1985-10-08 North American Philips Consumer Electronics Corp. Cathode ray tube focusing electrode shielding means
KR940005496B1 (ko) * 1991-12-30 1994-06-20 삼성전관 주식회사 음극선관
RU2765174C2 (ru) * 2017-05-02 2022-01-26 Джой Глобал Серфейс Майнинг Инк Фильтрация воздуха для самоходной горной машины
CN115822594B (zh) * 2023-02-10 2023-05-12 太原向明智控科技有限公司 一种采煤机端部进刀采煤工艺的判别装置及方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE689388C (de) * 1934-07-30 1940-03-19 Lorenz Akt Ges C Anordnung zur Ablenkung des Kathodenstrahls in Braunschen Roehren
CH308673A (de) * 1951-12-01 1955-07-31 Gmbh Fernseh Anordnung zur Fokussierung von Elektronenstrahlen.
US2785330A (en) * 1953-10-19 1957-03-12 Nat Video Corp Internal pole piece arrangement for a magnetically-focused cathode ray tube
US3401295A (en) * 1965-05-21 1968-09-10 Hitachi Ltd Periodic permanent magnet focusing system for electron discharge devices
JPS5632219B2 (enrdf_load_stackoverflow) * 1973-07-10 1981-07-27
JPS547236A (en) * 1977-06-20 1979-01-19 Hitachi Ltd High-resolution cathode-ray tube
JPS5539121A (en) * 1978-09-13 1980-03-18 Hitachi Ltd Electromagnetic focus cathode ray tube
JPS5543758A (en) * 1978-09-25 1980-03-27 Hitachi Ltd Cathode ray tube electron gun
JPS5559637A (en) * 1978-10-30 1980-05-06 Hitachi Ltd Magnetic focus cathode ray tube

Also Published As

Publication number Publication date
DE3125977C2 (enrdf_load_stackoverflow) 1989-01-12
US4439710A (en) 1984-03-27
GB2079530A (en) 1982-01-20
DE3125977A1 (de) 1982-03-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee